Rolling mill



May 15, 1928. 1,669,411

Dan A. Clark Z [nz/en tor Attorneys May 1'5. 1928.

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J *Aml Mt N\ 2 Sheets-Sheet 2 .8 Dan A. Clank Inventor Muzak.

III

Patented May 15,1928.

YUNITEDI'ISTATES P'ATENT orrica DON A. CLARK, OF CLEVELAND, OHIO, ASSTGNOR TO THE DUSTON AND CLARK ENGI- NEERING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

, ROLLI G MILL.

Application filed August 28, 1926. Serial No. 182,256.

My invention relates to rolling mills or the like, and particularly to means for eliminating irregularities in the material being rolled, and the principal object of my inventionis to provide a mill embodying such means. In the drawings accompan ing this specification and forming a part 0 th1s,application I have shown, for purposes of illustration, one formwhich my invention may assume. In these drawings:

Figure 1 is a general side elevation of the embodiment of my invention herein shown,

Figure 2 is a central vertical section through the means for operatingvthe mill rolls from the slow speed drive shaft, while Figure 3 is acentral vertical section through the means for operating the slow speed drive shaftfrom the high speed drive shaft connected to the driving motor.

The embodiment of my invention herein shown comprises generally a rolling mill, and driving means for operating the mill tending to operate the mill rolls at somewhat difi'erent speeds, but permitting the material being rolled forcing said rolls to operate at substantially the same spe ed.

The embodiment of my invention herein shown comprises a rolling mill 11, a rolling mill operating head 12, a speed reduction mechanism-13, and an operating motor 14, all suitabl connected.

The. rol ing mill 11 comprises a pair of upri hts 15 mounted upon a bed plate 16 and raced by suitable cross connections 17 and a pair of rolls 18 and 19 cooperating to roll material therebetween and mounted upon shafts 20 and 21 rotatably supported in the uprights 15 and provided on their ends adjacent the rolling mill drive shaft 12 with reduced polygonal extensions 22 and 23 respectively.

The rolling mill operating head 12 comprises a pair of uprights 24 also mounted upon the bed plate 16, allower driye shaft 25 rotatablysupported in the uprights 24 and provided with a reducedpolygonal extension 26 arranged to be non rotatably received within a cooperatingly formed poly onal recess 27 in the adjacent end of a wobbler 28 rovided on its other end with a polygonal recess 29 cooperatingly formed to non-rotatabl receive the'polygonal projection 23 on t e shaft 21 of the mill roll 19, a gear 30 splined to the lower drave shaft 25, an annular shaft 31 rotatably ,mounted in the uprights 24 vertically above the lower drive shaft 25, a gear 32 intermeshing with the gear 30 on the lower drive shaft 25 and spllned to the annular shaft 31 and formed of'less diameter than the gear 30 to cause the annular shaft 31 to rotate at a somewhat greater speed than the lower drive shaft 25, an upper drive shaft 33 rotatably mounted within the .annular' shaft 31 and provided with a reduced polygonalextension 34 arranged to be nonrotatably received within a cooperatingly formed polygonal aperture 35 in the who.- cent end of a Wobbler 36 pnovided at its other end with a polygonal recess 37 cooperating-1y formed to non-rotatably receive the polygonal extension 22 rojecting from the shaft 30 of the mill roll 18, and transmitting means 38 operatively connectin the annular shaft 31 to the upper drive s aft 33 tending to rotate the upper drive shaft 33 synchronously with the annular shaft 31, and therefore at a higher speed than the lower drive shaft 25, but permitting the slippage between the annular shaft 31 and the upper drive shaft 33 necessary to permit the material being rolled forcing the rolls Band 19 to operate" at substantially the same speed in spite of the operation of the annular shaft 31 at a higher speed than the lower ,drive shaft 25.

The connecting means 38 herein" shown comprises a spider 39 carrying a plurality of stud shafts'40 each rotatably supporting a planet'gear 41, an external gear 42 meshing with the various planet gears 41 and carried by a cylindrical member 43 secured by means of spokes 44 to a hub 45 splined to the upper drive shaft 33, a sun gear46 also meshing with the various planet gears 41 and freely rotatable upon the upper drive shaft 33, a brake wheel 47 splined to the sun gear 46 and disposed within the cylindrical'member 43carrying the external gear 42, and a plurality of brake shoes 48 adjustably mountedupon the cylindrical member 43 incontact with the brake drum 47 carried bythe sungear 46.

The drive for the rolling mill mechanism is herein shown as comprisin av speed re duced mechanism 13 inte'rpose between and connecting the high speed shaft 49 of the electric motor 14 and the low speed lower drive shaft 25 of the rolling mill mechanism.

This reduction mechanism 13 comprises a hou'sing50 fixedly mounted upon a suitable base 51' and containing on its interior an'ex- I ternal gear 52 meshing with a plurality of planet gears 53 rotatably mounted upon stud shafts 54 carried by a lanet carrier 55 rtatably supported within annular bosses 56 projecting from the two sides of the casing 50, a low speed shaft 57 splined to and supported by the planet carrier 55 and provided with a polygonal extension 58 no'n-rotatably inter-engaging with a cooperatingly formed olygonal recess in the adjacent end of the ower drive shaft 25, and a high speed shaft 59 rotatably mounted within the adjacent portion of the planet carrier 55, carrying a sun gear 60 meshing with the various planet gears, and connected to the electric motor 14 y means of a polygonal projection 61 extending from the driving shaft 59 and nonrotatably inter-engaging with a corres 0nding y shaped polygonal recess in the ad acent end of the motor shaft 49.

' From the above description it willbe obvious to those skilled in the art that operation of the motor 14 rotates the high speed shaft 59 and sun gear 60 to cause the planet gears 53 to rotate both about their individual axes 54 and also, because of their engagement with the stationary external gear 52, bodily about the axis of the high speed shaft 59, and that this latter motion causes a rotation of the lanet carrier 55'which is transmitted and the lowerrell 19, that operation of the upper drive shaft 33 will act through'thef upper wobbler 36 to rotate the u per millshaft 20 and the upper mill ro 18, and

that rot'ation of the lower drive shaft 25 will act through the gears 30 and32 to rotatethe annular shaft 31 at a speed somewhat greater than the'speed of rotation of the lower drive shaft-25. a a

I From the above description of .the power transmittin device 38 it will be obvious to those skilled in the art that the external-gear 48 and the planet gears 41 and the sun gear 46 comprise a differential transmission, that bodily rotation of the planet gears 41 will rotate the .sun gear 46 and external gear 42 differentially, that the interaction of the brake shoes 48 carried by the cylindrical member 43 and the brake drum 47 carried by the sun gear 46 will tend tocause the sun 41, that by this action the power transmisgear 46 and the external gear 42 'to rotate synchronously with each other and therefore Ely eliminating the differential rotation of e planet gears 41, to rotate synchronously with the bodily rotation of the planet gears sion mechanism 38 tends to rotate the upper drive shaft 33 synchronously with the annular shaft 31, that the connections between the brake shoes38 on the cylindrical member 43 and the brake drum 37 on the sun gear 46 will permit differential rotation of the sun gear 46 and the external gear 42 to permit the external gear 42 to rotate at a lower speed than the speed of bodily rotationof the planet gears41, the speed of rotation of ,the annular shaft 31, and that this slippage between the brake shoes 48 and brake drum 47 therefore permits the upper drive shaft 33 to rotate at a speed lower'than the speed of rotation of the annular shaft 31.

It'will therefore be obvious to those skilled in the art that operation of the lower drive shaft 25 will act through the annular shaft 31 and power transmitting mechanism 38 to tend to rotate the upper drive shaft 33 and the upper mill roll 18 at a greater speed than the speed of rotation of the lower mill roll 19, but that the power transmitting mechanism 38 is effectlvetopermit the material beingrolled to force the mill rolls 18 and 19 to rotate at substantially thesame speed even against the tendency of the u per mill roll 18 to rotate at the higher speed.

'Under these circumstances itwill be obvious to those skilled in the art that the drivin mechanism is constantly tending to drive the upper roll 18a t a higher speed than the speed at which the driving mechanism operates the lower roll 19, and that this tendency persists even when the material being material, and I ascribe this to'the maintenance of the rolls and connections constantl under tension, and to the consequent elimination of the chattering universally present in rolling mills;

-At the sametime 10f course do not limit my invention to o eration under thisor any ot er particular t eory.

From the above description it now be obvious tothose skilled in the art that I have produced new and improved mechanism satisfying at least the principal object of my invention.

At thetsame time it will also be obvious to those skilled in the art that the particular embodiment of my invention hereinshown and described may be variously changed and modified without'departin from the spirit of my invention or sacri cin the advantages thereof, and it willthere ore be understood that the disclosure herein is illustrative only, and that my invention is not lim; ited thereto.

I claim i I 1. In a rolling millor the like, a pair of 2. In a rolling mill or the like, a pair-of rolls cooperating to roll material therebetween, and drivin means for said rolls connected to said rolls constructed to operate -rolls cooperating'to roll material therebesaid rolls at somewhat difierent peripheral speeds, but permitting the material being rolled retardlng the faster roll to-cause said faster roll to rotate only at substantially the normal speed of the slower roll, each roll operating to feedsaid material.

3'. In a rolling mill or the like, a pair of rolls cooperating to roll material therebetween, and driving means for said rolls constructed to operate said rolls at somewhat difierent peripheral speeds, but comprising an iinpositive connection to the'faster roll permitting the material being rolled retard-.

ing the faster roll, to cause said faster roll to rotate only at substantially the normal speed of the slower roll, each roll operating to feed said material.

4. In a rolling mill or the like, a pair of rolls cooperating to roll material therebetween, and driving means for said rolls-constructed to operate said rolls at somewhat different peripheral speeds, but comprising a frictional connectionto the faster roll permitting the material being rolled retarding the faster roll to cause said faster roll to ro-- tate only at substantially the normal speed of the slower roll, each, roll operating to .1

feed said material.

5. Ina rolling mill or the like, a .pair of rolls cooperating to roll material therebetween, and driving means for said rolls connected to said rolls constructed to operate said rolls at somewhat different peripheral speeds, but comprising an impositivecon-' permittin the ma-- nection to the faster roll terial being rolled retarding the aster roll to cause said faster roll to rotate only'at substantially the normal speed of the slower roll, each roll operating to feed said material.

6. In arolling miller the like, a air of rolls cooperating to roll material t erebes tween, and driving means for said rolls connected to said rollsconstructed to operate said rolls at somewhat different peripheral speeds, but comprising africtional connection-to the faster roll permitting the material being rolled retarding the faster roll to cause said .faster roll to rotate only -at subt 11 th normal s eed of the slower stun m V e p .stantially the speed of said other'roll. each roll, each-roll operating to feedsaid matel'lal- I i i I material being rolled retarding the faster roll to cause said faster'roll to rotate only at substantially the normal speed of the slower roll, each roll operating to feed said material.

8. In a rolling mill or the like, a pair of tween, and a'single driving means for said rolls connected to said rolls constructed to operate said rolls at somewhat difierent peripheral speeds, but comprising a frictional connection to the faster-roll permitting the material being rolled retarding the faster roll to cause said faster roll to rotate only at substantially the normal speed of the slower roll, each roll operating to feed said material. l

9. In a rolling mill or the like, a pair of rolls cooperating to roll material therebetween, and driving means for said rolls con 'structed to operate said rolls at somewhat difierent peripheral speeds one faster than the other, but permittingthe materialbeing rolled forcing said one roll to operate only at substantially the speed of said other roll, each roll operating to feed said material.

10. In a rolling mill or the like, a pair of rolls cooperating to roll material therebetween, and driving means for said rolls connected to said rolls constructed to operate said rolls'at somewhat difl'erent peripheral speeds one faster'than the other, but ermitting the material being rolled forcmg said one roll to operate only at substantially the speed of said otherroll, each roll operating to feed said material.

11. In a rollingmill or the like, a pair of rolls cooperating to roll material therebetween, and driving means for said rolls con structedto operate said rolls at somewhat, different peripheral speeds one faster than the other,'but comprising an impositive connection interposed in 'the drive of said one roll permitting the material being rolled forcing said one roll to operate only at substantially the/speed of said other roll, each roll operating to feed said material.

12. In a rolling mill or the like, a pa r of rolls cooperating to roll material therebetween, and driving means for said rolls constructed to operate said rolls at somewhat .diiferent peripheral speeds one faster than the other, but comprising a frictional connection interposed in'the drive of said one roll permitting the material being rolled forcing saidone roll to operate only at subroll operating to feed saidmaterial.

13. In a rolling mill orthe like, a pair-of rolls cooperating to roll material therebetween, and driving means for said rolls connected to said rolls constructed to operate said rolls at somewhat different peripheral speeds one faster than the other, but comprising an impositive connection interposed in the drive of said one roll permitting the material being rolled forcing saidone roll to operate only at substantially the speed of said other roll, each roll operating to feed said material. I

14. In a rolling mill or the like, a pair of rolls cooperating to roll material therebetween, and driving means for said rolls connectedto said rolls constructed to operate said rolls at somewhat different peripheral speeds one faster than the other, but comprising a frictional connection interposedin the drive of said one roll permittlngthe material being rolled forcing said one roll to operate only at substantially the speed of said other roll, each roll operating to feed said materiaL- 15. In a rolling mill tween, and a single driving means for said rolls connected to said rolls constructed to operate said rolls at somewhat different peripheral speeds one faster than the other, but comprising an impositive connection interposed in the drive of said one roll permitting the material being rolled forcing said one roll to operate only at substantially the speed ofsaid other roll, each roll operatin to feed said material.

or thelike, a pair of. rolls cooperating to roll material therebe signature.

operate said rolls at somewhat different peripheral speeds one fasterthan the other, but comprising a frictional connection interting the material being rolled forcing said one roll to operate only at substantially the speed of saidother roll, each roll operating to feed said material.

17. Transmission mechanism comprising a differential transmission having a driven element. and a driving element and a third element connected differentially to said driven element and said driving element, and connecting means adapted tof connect said third element to another of said elements by an impositive frictional connectionbetween two members-connected to rotate in the same direction upon operation of said mechanism.

. 18. Transmission "mechanism comprising a diderential transmissionhaving a driven element and a driving element and a third element connected differentially to said driven element and said driving element, and connecting means adapted to connect said third element to saiddriven element by an impositivefrictional connection between t-Wdmembers connected to rotate in the same direction upon operation of said mechanism.

Intestimony whereof I hereunto afiix my hon A. CLARK.

posed in the drive of said one roll permit- 

